Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
GAIN POINTS ON THE “STAND”
A failure to "stand" due to poor paint quality model. A crucial role when applying color coating plays spray. I tried them for twenty years are many, but none fully satisfy me. That's...
THE DRILL OF DRILLS
I'm probably not mistaken saying that the majority of home handymen's dream is to have a universal bormashenko. How many opportunities it opens! Engraving, abrasive machining of parts of...
